<template>
  <header class="header">
    <h1>todos</h1>

    <input
      id="toggle-all"
      class="toggle-all"
      type="checkbox"
      v-model="chkAll"
    />
    <label for="toggle-all"></label>
    <input
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
      v-model.trim="task"
      @keyup.enter="add"
    />
  </header>
</template>

<script>
export default {
  props: ["list"],
  data() {
    return {
      task: "",
    };
  },
  methods: {
    add() {
      if (this.task == "") {
        alert("请输入内容");
      }
      this.$emit("add", this.task);
      this.task = "";
    },
  },
  computed: {
    chkAll: {
      set(val) {
        this.list.forEach((item) => (item.isDone = val));
      },
      get() {
        return this.list.every((item) => item.isDone);
      },
    },
  },
};
</script>